Patents by Inventor Yukihiro Sakaguchi
Yukihiro Sakaguchi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9534690Abstract: This leakage prevention seal is provided with: a first seal ring which surrounds a rotating shaft and which is in circumferential contact with the surface of a housing which faces the upstream side; a second seal ring, which, on the upstream side of the first seal ring, surrounds the rotating shaft and which is in circumferential contact with the first seal ring; and a heat-driven section which, when high-temperature pressurized water reaches the heat-driven section, reduces the diameter of both the first seal ring and the second seal ring and causes the inner peripheral surfaces of both the first seal ring and the second seal ring to be in contact with the rotating shaft. The circumferential positions of both a first range between the first seal ring and the rotating shaft and a second range formed by the second seal ring are different.Type: GrantFiled: December 24, 2013Date of Patent: January 3, 2017Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hidetaka Kafuku, Hidekazu Uehara, Yukihiro Sakaguchi
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Publication number: 20160010749Abstract: This leakage prevention seal is provided with: a first seal ring which surrounds a rotating shaft and which is in circumferential contact with the surface of a housing which faces the upstream side; a second seal ring, which, on the upstream side of the first seal ring, surrounds the rotating shaft and which is in circumferential contact with the first seal ring; and a heat-driven section which, when high-temperature pressurized water reaches the heat-driven section, reduces the diameter of both the first seal ring and the second seal ring and causes the inner peripheral surfaces of both the first seal ring and the second seal ring to be in contact with the rotating shaft. The circumferential positions of both a first range between the first seal ring and the rotating shaft and a second range formed by the second seal ring are different.Type: ApplicationFiled: December 24, 2013Publication date: January 14, 2016Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hidetaka Kafuku, Hidekazu Uehara, Yukihiro Sakaguchi
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Patent number: 8978433Abstract: A pipe diameter expansion apparatus includes: a hollow cylindrical member that can be placed in a pipe filled with water, and through which a coolant medium having a lower temperature than a freezing point of the water flows from one end to the other end; at least two plate-like fins provided to protrude outward from the cylindrical member; and a cold-heat insulator that is provided between the two fins, and reduces cold-heat transmission between inside and outside the cylindrical member.Type: GrantFiled: July 29, 2013Date of Patent: March 17, 2015Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Keisuke Kamitani, Kazuhiko Kamo, Jiro Kasahara, Yukihiro Sakaguchi
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Publication number: 20150053377Abstract: A heat exchanger includes a heat transfer tube; a plurality of fins each having ark-shaped contact surfaces configured to be brought into contact with an outer peripheral surface of the heat transfer tube, each of the fins being attached from the outside in a radial direction of the heat transfer tube; an adhesive that bonds the outer peripheral surface of the heat transfer tube and the contact surface of each of the fins; and a position regulation portion which is provided between the fins adjacent to each other in the tube axis direction and regulates a position in the tube axis direction of each of the fins.Type: ApplicationFiled: August 20, 2014Publication date: February 26, 2015Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Nobuhide Hara, Koichi Tanimoto, Yoshihiko Yoshida, Yukihiro Sakaguchi, Masahiro Yoshioka, Fumikazu Ogata
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Publication number: 20140090434Abstract: A pipe diameter expansion apparatus includes: a hollow cylindrical member that can be placed in a pipe filled with water, and through which a heat medium having a lower temperature than a freezing point of the water flows from one end to the other end; at least two plate-like fins provided to protrude outward from the cylindrical member; and a heat insulator that is provided between the two fins, and reduces heat transmission between inside and outside the cylindrical member.Type: ApplicationFiled: July 29, 2013Publication date: April 3, 2014Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Keisuke Kamitani, Kazuhiko Kamo, Jiro Kasahara, Yukihiro Sakaguchi
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Patent number: 8152487Abstract: An inverter-integrated electric compressor that is capable of solving various problems caused by thermal expansion of a gel material filled inside an inverter accommodating section for vibration prevention and moisture prevention and capable of increasing reliability is provided. In the inverter-integrated electric compressor, an inverter accommodating section (11) is integrated with a periphery of a housing (2) accommodating an electric compressor; an inverter device (20) is accommodated inside the inverter accommodating section; a gel material (30) for vibration prevention and moisture prevention is filled in the upper section thereof so as to leave an air layer (31); an upper opening in the inverter accommodating section is sealed with a cover member (18); and a vent valve (40) formed of a moisture-permeable waterproof membrane (42) is provided in the cover member.Type: GrantFiled: September 18, 2008Date of Patent: April 10, 2012Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Takayuki Watanabe, Manabu Suzuki, Yuki Ichise, Yukihiro Sakaguchi, Takeshi Hirano, Akinori Yoshioka, Takayuki Hagita
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Publication number: 20100018244Abstract: An inverter-integrated electric compressor that is capable of solving various problems caused by thermal expansion of a gel material filled inside an inverter accommodating section for vibration prevention and moisture prevention and capable of increasing reliability is provided. In the inverter-integrated electric compressor, an inverter accommodating section (11) is integrated with a periphery of a housing (2) accommodating an electric compressor; an inverter device (20) is accommodated inside the inverter accommodating section; a gel material (30) for vibration prevention and moisture prevention is filled in the upper section thereof so as to leave an air layer (31); an upper opening in the inverter accommodating section is sealed with a cover member (18); and a vent valve (40) formed of a moisture-permeable waterproof membrane (42) is provided in the cover member.Type: ApplicationFiled: September 18, 2008Publication date: January 28, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Takayuki Watanabe, Manabu Suzuki, Yuki Ichise, Yukihiro Sakaguchi, Takeshi Hirano, Akinori Yoshioka, Takayuki Hagita
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Patent number: 7289687Abstract: A polarization-maintaining optical fiber which exhibits an excellent polarization-maintaining performance and significantly low splice loss when spliced with a polarization-maintaining optical fiber having a cladding 125 ?m in diameter even if the polarization-maintaining optical fiber has a small-diameter cladding of about 80 ?m. The polarization-maintaining optical fiber includes a core, a pair of stress-applying parts provided radially outwardly with respect to the core, and a cladding which surrounds the core and the stress-applying parts. With a diameter D of the stress-applying parts between 21 ?m and 32 ?m, a distance R between the stress-applying parts between 6 ?m and 17 ?m, and a relative refractive index difference ? between 0.3% to 0.5%, a sufficiently large mode field diameter (MFD) is obtained; thus splice loss can be reduced.Type: GrantFiled: September 10, 2004Date of Patent: October 30, 2007Assignee: Fujikura Ltd.Inventors: Katsuaki Izoe, Kuniharu Himeno, Yukihiro Sakaguchi, Tatsuya Itoh
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Publication number: 20050031280Abstract: A polarization-maintaining optical fiber which exhibits an excellent polarization-maintaining performance and significantly low splice loss when spliced with a polarization-maintaining optical fiber having a cladding 125 ?m in diameter even if the polarization-maintaining optical fiber has a small-diameter cladding of about 80 ?m. The polarization-maintaining optical fiber includes a core, a pair of stress-applying parts provided radially outwardly with respect to the core, and a cladding which surrounds the core and the stress-applying parts. With a diameter D of the stress-applying parts between 21 ?m and 32 ?m, a distance R between the stress-applying parts between 6 ?m and 17 ?m, and a relative refractive index difference ? between 0.3% to 0.5%, a sufficiently large mode field diameter (MFD) is obtained; thus splice loss can be reduced.Type: ApplicationFiled: September 10, 2004Publication date: February 10, 2005Inventors: Katsuaki Izoe, Kuniharu Himeno, Yukihiro Sakaguchi, Tatsuya Itoh
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Patent number: 5914385Abstract: An addition type polyimide resin raw material composition having high heat resistance and high corrosion resistance comprising a tetracarboxylic anhydride and/or tetracarboxylic diester compound, diamine compound and exo-3,6-epoxy-1,2,3,6-tetrahydrophthalic anhydride and/or exo-3,6-epoxy-1,2,3,6-tetrahydrophthalic monoester compound; a composition containing a prepreg; a fiber-reinforced polyimide composite prepreg, coating material and paint using them; and a curing method thereof.Type: GrantFiled: December 4, 1996Date of Patent: June 22, 1999Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Noriya Hayashi, Naomoto Ishikawa, Yukihiro Sakaguchi, Shunichi Hayashi, Hitoshi Noda
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Patent number: 5692936Abstract: A moisture-permeable waterproof fabric comprising a textile fabric and, provided on at least one surface of said textile fabric, a resin film comprising a polyurethane resin produced by reacting an isocyanate with a polyol and a chain extender and having a glass transition temperature in the range of from -20.degree. to 20.degree. C. and an ethylene oxide unit content of at least 7.0 mol/kg. The moisture-permeable waterproof fabric is produced by coating at least one surface of a textile fabric with a solution of a resin in a polar organic solvent, the resin comprising a polyurethane resin, and subjecting the coating to wet solidification in a coagulation bath to form a film, or coating a release paper with a solution of a resin in a polar organic solvent, the resin comprising a polyurethane resin, to form a resin film and adhering the resin film on at least one surface of a textile fabric.Type: GrantFiled: April 22, 1996Date of Patent: December 2, 1997Assignees: Komatsu Seiven Co., Ltd., Mitsubishi Jokogyo Kabushiki KaishaInventors: Munehide Yamaguchi, Hideki Chatani, Shunichi Hayashi, Yukihiro Sakaguchi, Satoru Kondo